diff --git a/src/EcoFOCIpy/io/rcm_parser.py b/src/EcoFOCIpy/io/rcm_parser.py
index 216e56f..0680da3 100644
--- a/src/EcoFOCIpy/io/rcm_parser.py
+++ b/src/EcoFOCIpy/io/rcm_parser.py
@@ -62,7 +62,7 @@ def parse(self, filename=None, number_of_channels=8, time_format=0, datetime_ind
         else:
             headernames=['sample','date','time','ident','speed_engr','dir_engr','temp_engr','cond_engr','press_engr']
 
-        rawdata_df = pd.read_csv(filename, names=headernames, delimiter="\s+",)
+        rawdata_df = pd.read_csv(filename, names=headernames, delimiter=r'\s+',)
         if time_format == 0:
             rawdata_df["date_time"] = pd.to_datetime(
                 rawdata_df['date'] + " " + rawdata_df['time'], format="%m/%d/%Y %H:%M:%S"
diff --git a/src/EcoFOCIpy/io/sbe_parser.py b/src/EcoFOCIpy/io/sbe_parser.py
index 67eaf74..8054635 100644
--- a/src/EcoFOCIpy/io/sbe_parser.py
+++ b/src/EcoFOCIpy/io/sbe_parser.py
@@ -76,7 +76,7 @@ def parse(filename=None, return_header=True, datetime_index=True):
 
 
         rawdata_df = pd.read_csv(filename, 
-                        delimiter="\s+", 
+                        delimiter=r'\s+', 
                         parse_dates=True, 
                         header=None,
                         names=var_names.values(), 
@@ -131,7 +131,7 @@ def parse(filename=None, datetime_index=True):
         assert filename.split('.')[-1] == 'tid' , 'Must provide a tid file - use sbe software to convert'
 
         rawdata_df = pd.read_csv(filename, 
-                                 delimiter="\s+", 
+                                 delimiter=r'\s+', 
                                  skiprows=1, 
                                  names=["date", "time", "pressure", "temperature"])
         
@@ -289,7 +289,7 @@ def parse(filename=None, return_header=True, datetime_index=True):
 
 
         rawdata_df = pd.read_csv(filename, 
-                        delimiter="\s+", 
+                        delimiter=r'\s+', 
                         parse_dates=True, 
                         header=None,
                         names=var_names.values(), 
diff --git a/src/EcoFOCIpy/io/wetlabs_parser.py b/src/EcoFOCIpy/io/wetlabs_parser.py
index d7eb38f..e4e3f69 100644
--- a/src/EcoFOCIpy/io/wetlabs_parser.py
+++ b/src/EcoFOCIpy/io/wetlabs_parser.py
@@ -52,7 +52,7 @@ def parse(self, filename=None, return_header=True, datetime_index=True):
  
 
         rawdata_df = pd.read_csv(filename, 
-                        delimiter="\s+", 
+                        delimiter=r'\s+', 
                         parse_dates=True, 
                         header=None, 
                         skiprows=headercount)       
diff --git a/src/EcoFOCIpy/io/wpak_parser.py b/src/EcoFOCIpy/io/wpak_parser.py
index bbab330..ab47455 100644
--- a/src/EcoFOCIpy/io/wpak_parser.py
+++ b/src/EcoFOCIpy/io/wpak_parser.py
@@ -33,7 +33,7 @@ def parse(filename=None, argos_file=False, datetime_index=True):
         """
         assert filename != None , 'Must provide a datafile'
 
-        rawdata_df = pd.read_csv(filename, header=0, delimiter="\s+")
+        rawdata_df = pd.read_csv(filename, header=0, delimiter=r'\s+')
         rawdata_df["date_time"] = pd.to_datetime(
             rawdata_df["DATE"] + " " + rawdata_df["TIME"], format="%y/%m/%d %H:%M:%S"
         )